The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2024
Filed:
Jan. 18, 2022
Hitachi Power Semiconductor Device, Ltd., Hitachi, JP;
Satoshi Iesaka, Hitachi, JP;
Kenji Sakurai, Hitachi, JP;
Hitachi Power Semiconductor Device, Ltd., Ibaraki, JP;
Abstract
The upper arm drive circuit for controlling the drive of an upper arm switching element of the power conversion device includes: an upper arm gate voltage output wiring connected to a gate of the upper arm switching element; a first upper arm drive circuit reference potential wiring; an upper arm gate voltage reference potential wiring connected to an inverter output of the power conversion device; and a control circuit of upper arm drive circuit reference potential wiring potential for controlling the potential of the first upper arm drive circuit reference potential wiring to a potential lower than a reference potential when a potential of the inverter output is equal to a predefined potential that is lower than the reference potential or lower. The first upper arm drive circuit reference potential wiring is connected to the reference potential via the control circuit of upper arm drive circuit reference potential wiring potential.